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Portable and Peripheral Devices

What is a Desktop?

A desktop is a main computer that has a separate hardrive with all its memory and storage. A desktop has usually a large moniter and a mouse as its inputs.

Portable Devices

Portable devices are something that is small and lightweight. Laptop computers are portable because they are easy to carry. Other portable devices include PDA's, hand-held computers and TabletPC's.
Some other portable devices are notebooks and netbooks. A notebook is an even smaller and more compact laptop and netbook is a compact notebook but it specialises in connecting to the internet and the use of the internet.

Peripherals Devices

A peripheral device is called either an input or an output. A computer device, such as a CD-ROM drive or printer, that is not part of the essential computer, i.e., the memory and microprocessor. Peripheral devices can be external -- such as a mouse, keyboard, printer, monitor, external Zip drive or scanner or internal, such as a CD-ROM drive or CD-R drive.

Internal extras are inputs and external extras are outputs.

Storage Devices

There are three different ways in which storage can be opened and saved. Optical, Magnetic and Solid State.


Optical storage is any storage method in which data is written and read with a laser for archival or backup purposes. Typically, data is written to optical media, such as CDs and DVDs. For several years, proponents have spoken of optical storage as a near-future replacement for both hard drives in personal computers and tape backup in mass storage. Optical media is more durable than tape and less vulnerable to environmental conditions. On the other hand, it tends to be slower than typical hard drive speeds, and to offer lower storage capacities. According to OSTA (Optical Storage Technology Association), current optical speeds are approaching those of hard drives. A number of new optical formats, such as Blu-ray and UDO (ultra density optical), use a blue laser to dramatically increase capacities.


The key difference between optical storage media, such as CDs and DVDs, and magnetic storage media, such as hard drives and old-fashioned floppy disks, is in how computers read and write information to them. One uses light; the other, electromagnetism.

Magnetic storage uses disks coated with a magnetic material. Each tiny bit of the disk carries a magnetic charge; the direction of that charge determines what code or number it is.

Solid State

Solid state storage is a type of computer storage media that is made from silicon microchips. Solid state storage stores data electronically instead of magnetically, as spinning hard disk drives or magnetic oxide tape do.

Solid-state storage can be found in three form factors: solid state drives (SSD), solid state cards (SSC), solid state modules (SSM). An important advantage of solid-state storage is the fact that it contains no mechanical parts, allowing data transfer to and from storage media to take place at a much higher speed and providing a more predictable lifespan for the storage media.